1. Department of Neurogenetics, Kennedy Krieger Institute, ., Departments of Neurology and Pediatrics, The Johns Hopkins School of Medicine
2. Department of Neurogenetics, Kennedy Krieger Institute, Department of Pediatrics, The Johns Hopkins School of Medicine
3. Division of Metabolism, Kennedy Krieger Institute
4. Division of Metabolism, Kennedy Krieger Institute, Department of Pediatrics, The Johns Hopkins School of Medicine
5. Department of Neurology, Kennedy Krieger Institute, Department of Neuroscience, The Johns Hopkins School of Medicine
6. Center for Genetic Medicine Children's National Medical Center, Washington, DC
7. Department of Pediatrics, The Johns Hopkins School of Medicine
8. Department of Biostatistics The Johns Hopkins Bloomberg School of Public Health, The Johns Hopkins University, Baltimore, MD
9. Department of Neuroscience, Kennedy Krieger Institute, Departments of Neurology and Neuroscience The Johns Hopkins School of Medicine
10. Division of Neurology and Developmental Medicine Kennedy Krieger Institute, Baltimore,, Departments of Neurology and Pediatrics, The Johns Hopkins School of Medicine